DK Readers: Mega Machines is a DK Level 1 Reader designed for children who are beginning to read. These readers feature simple sentences, limited vocabulary, a picture glossary, and a simple index; at this stage, adult participation is still helpful. In 'Mega Machines' students will read about a construction site that has bulldozers, diggers, and cement mixers as they put the finishing touches building a new school and have a grand opening ceremony. 32 pages, hardcover. Ages 5-7 / Grades K-2.